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If your vehicle is considered by many to be the benchmark of its segment, how do you improve upon it? If you’re BMW and the vehicle in question is the 2011 BMW 5 Series, you add a bit of everything.

First, you start under the hood. At next June’s launch, BMW will offer the 535i and 550i, the former with BMW’s first-ever application of turbocharging, direct injection, and its Valvetronic throttle-less intake system on the latest version of its inline six-cylinder engine. The combination is good for 300 horsepower at 5800 rpm and 300 pound-feet all the way from 1200 rpm to 5000 rpm. The latter, meanwhile, will quench your thirst for speed with BMW’s 4.4-liter direct-injected twin-turbocharged V-8 that makes 400 horses between 5500 and 6400 rpm and 450 pound-feet from 1800 to 4500 rpm.

BMW says the six-cylinder engine is good for a 0-to-60 time in the six-second range and 28 mpg on the combined Euro-cycle while the V-8 will do it in the five-second range. Cars equipped with the optional Sport Package will be limited to 150 mph while those without will stop at 130 mph. The Sport Package also adds larger 19-in wheels and stickier summer tires to replace the stock 17- or 18-in wheels and all-season rubber. A new M5 is coming somewhere down the line, but hints from BMW indicate the V-10 is gone in favor of a smaller engine with forced induction, likely the X6 M’s 555-hp twin-turbo V-8.

Later on in 2010, BMW will introduce the 528i, which will be powered by a naturally aspirated version of the inline-six that’ll punch out 240 horses. BMW has also indicated that while it doesn’t have plans for a diesel powertrain in the U.S. yet, it’s certainly possible if the market is there. In fact, the higher-ups at BMW see a big market for diesels in America if they catch on. Sources also indicate that a 5 Series ActiveHybrid is all but a done deal, but BMW is being coy with the details.

Both engines will be offered with either a six-speed manual transmission or BMW’s new eight-speed automatic, which comes in a Sport version. Utilizing five clutch packs, the eight-speed is no slouch and can make direct gearshifts rather than cycling through intermediate gears for better performance and efficiency.

Efficiency really is the name of the game with the new 5 Series. The car has been designed to be more frugal while performing better at the same time. Witness, for example, the first-ever application of electric power steering in a BMW. As with other accessories, it engages itself only when needed, freeing up engine power. Meanwhile, a smart alternator charges only on deceleration and braking to recover power rather than run constantly and drag on the engine. Active cooling flaps behind the kidney grilles, meanwhile, keep temperature optimal and reduce drag whenever possible.

It’s not all electronic trickery, though. BMW has gone on an aluminum binge to bring the car’s weight down in a further effort to improve handling and fuel-efficiency. The first place you’ll find that aluminum is under the car. The entire front and rear subframes are made of it, as are most suspension pieces to reduce weight. BMW also sculpted the new hood, front fenders, and doors from the lightweight metal to shave weight, and the pounds added up. The materials switch alone was enough to take 50 pounds off each door.

That lightweight suspension, by the way, isn’t just a new alloy, it’s also heavily improved. How do you improve on a BMW’s handling? By throwing away the rulebook. Gone are the MacPherson struts up front and in their place is a double-wishbone suspension that moves the shocks inboard where they won’t screw up the suspension geometry. Out back, BMW added a fifth link to the multilink rear suspension for even more control, and the available Integral Active Steering has been updated to better control the steering of the rear wheels. That means better stability both at speed and in corners. BMW now says the new 5 Series can handle just as well as the 3 Series.

If you’re too distracted by the shapes all that aluminum has been formed into, though, we wouldn’t blame you. In fact, if at first glance you thought you were looking at the 7 Series, don’t feel badly. The 5 and 7 Series are built in the same factory and, with the new sixth-generation 5, share many of the same components. True, the new 5 Series may be three inches longer and ride on a 1.5-in-longer wheelbase, but it’s nowhere near the size of the 7 Series.

In a clear departure from the current 5 Series, the new car’s nose sits up and demands you take notice. In fact, the much larger kidney grille actually leans ever so slightly forward for a more aggressive look that harks back to the shark-nosed BMWs of yore. To the sides, the trademark quad round headlights sport the also-trademark LED rings surrounding standard adaptive HID headlights.

Differentiation from the 7 Series is clear above and below the grille. Below, BMW’s design team has turned up the edges of the lower radiator opening around the foglights to match the curvature of the wheel arches — giving the car the faintest hint of a smile. Above, the muscular hood bulges up with strong lines raking back toward the windshield.

Those with a fine eye for design will be drawn to the side of the car, where a powerful character line appears out of nowhere from the front fender and becomes more pronounced as it passes the door handles and reaches out to the taillights, creating an ever-larger shadow that makes the car look fast even when it’s standing still. Below it, a much gentler line slowly arcs its way up the side of the car along the rocker panels, disappears in the wheelarch, and returns on the rear bumper. Higher up, the trademark Hoffmeister kink is there, but it’s been pushed back as far as possible in the C-pillar and now arcs gracefully into the rear edge of the door. A gentle curve in the door skin carefully matches the flare of the rear fender to keep the car’s lines flowing all the way around.

If the front of the car looks larger and more squared-off, the rear appears tighter and more athletic. The classic L-shaped taillights have been pulled in toward the center while the reflectors have been tucked under the character line pulled up from the rockers. An integrated spoiler juts out from the trunk lid and is squared-off for a strong, purposeful look.

Hiding beneath that trunklid is an impressive 18.2 cubic feet of space that opens up even further should you drop the optional 60/40 split rear seats. With the seats upright, rear-seat passengers will be treated to an extra half-inch of legroom thanks to that wheelbase stretch, and they can use it to stretch out and relax while they enjoy movies or Internet browsing via remote on the screens mounted in the backs of the front seats. That’s after they set the precise temperature they prefer from the dual-zone rear seat climate controls, of course.

Moving further forward, we come to the 10-way power-adjustable front seats and the all-new dashboard. Sharp eyes will note the resemblance it bears to the dash found in the 7 Series and the new 5 Series Gran Turismo, but there are subtle differences. While BMW angles all their center stacks toward the driver, the degree to which they do so depends on how sporty the vehicle is. The 5 Series’ console, then, has a strong tilt to it, six degrees to be exact.

On that center stack you’ll find BMW’s updated black panel displays, now separated into two separate control consoles with one handling the audio and the other the climate control. The iDrive controller sits below them to the right of the gear selector while the 10.2-inch display (seven inches without nav) rides on top with very little hood thanks to a special foil coating that makes the sun’s rays actually enhance the image rather than wash it out. Cutting across the center of the console is a line of wood trim that wraps all the way around the interior and is framed by a thin strip of aluminum on three sides. It comes standard in Dark Burl Wood Ash, but Ash Anthracite and Fineline Matte are optional. For account executives on the go, cupholders can be found ahead of the gear selector on automatic transmission cars and behind the shifter on manuals. BMW has also carved out a nice little compartment to receive the key fob if you’d rather not try to stuff it back in your pocket once you’re in the car.

Moving toward the driver, a refreshed steering wheel now houses controls for the navigation system if so equipped and sitting ahead of a new instrument cluster that, again, reminds of other models. Four circular gauges make up the simple display, but start the car and the lower section of the cluster actually becomes an information screen that can display vehicle, navigation, and other information. For those who like to keep their eyes on the road, a heads-up display is optional.

Of course, fancy looks are only the beginning. At the driver’s fingertips are a host of technologies designed to keep him safer, better in control, and more aware of his surroundings. Leading the charge is BMW’s new Top View camera system that, like Infiniti‘s Around View, gives the driver a bird’s-eye view of the car to aid in parking. Of course, if parking is a real headache, why not just let the car do it? At speeds up to 22 mph, BMW’s Parking Assistant scans empty spaces along the curb looking for one big enough. Once the driver selects a spot and puts the car in reverse, the system can take over and parallel park the car while the driver works only the gas and brake pedals. Park Distance Control sensors let the system as well as the driver know how close their getting to other vehicles.

Those aren’t the only new tricks the 5 Series has learned, either. Of course it has a backup camera, but now it’s also got Side View, which mounts cameras in the front fenders so the driver can peer out of a blind driveway without sticking the nose into traffic. Once on the road, the Active Blind Spot Detection system keeps an eye out for cars in adjacent lanes and can vibrate the steering wheel if the driver goes to change lanes anyway. The steering wheel will also vibrate if the car is traveling faster than 43 mph and the Lane Departure Warning system is on and the driver begins to wander.

Not enough? How about adaptive cruise control that can slow the car to a stop and get it moving again if stopped less than three seconds? Or a collision warning system that visually and audibly alerts the driver if they’re about to rear-end someone and can even hit the brakes for them? Or automatic high beams? Then there’s BMW’s Night Vision with Pedestrian Detection, which will warn you if a collision with a bike or pedestrian is predicted as well as give you a better view of the road at night.

The fact is the 5 Series has a lot of tricks up its sleeve, and there are even more going on below the surface. Toggling through the Driving Dynamic Control’s four settings can change the steering ratio, throttle response, and automatic shift points and even scale back the traction control in Sport-Plus mode. The Dynamic Stability Control, meanwhile, handles the ABS, Cornering Braking Control, Dynamic Brake Control, Brake Fade Compensation, Brake Drying, and Stability Control. It can even snug the brake pads up to the rotors so they’re ready in an emergency and hold the car in position at a stop so it doesn’t roll back or creep. Meanwhile, Active Roll Stabilization balances out lean in corners while an electronic limited-slip differential keeps the rear tires in line. BMW’s FlexRay system networks all the sensors and programs together at speeds 20 times that of previous systems.

So, does the 2011 BMW 5 Series raise the bar for the segment? It certainly makes a compelling case on paper, but things have heated up recently in its class, what with a new Mercedes-Benz E-Class, a relatively new Jaguar XF and a Cadillac CTS taking on all comers. We’ll just have to pit one against its rivals when it debuts in U.S. showrooms in June 2010 and we can get our hands on one.

BMW’s official press release available on the following pages contains a complete breakdown on all the 2011 5 Series details.

OFFICIAL BMW PRESS RELEASE:

The New BMW 5 Series In Detail
Design: Tailored Elegance and Sporting Aesthetics.

Exterior: Dynamic proportions in perfect balance.
The proportions of the new BMW 5 Series Sedan are defined in archetypal BMW style by the long wheelbase and hood, short overhangs, aft-set greenhouse, and the coupe-like flowing roofline. The slightly wedge-like shape of the body creates a sporty, forward-moving character. The fresh interpretation of BMW’s signature Hofmeister kink at the bottom of the C-pillar further emphasizes the dynamic looks of the car in profile.

The entire silhouette is superbly balanced, providing a clear indication of the near-perfect front-to-rear weight distribution for all engine variants. Measuring 2.97 meters or 116.9”, the wheelbase of the new BMW 5 Series is the longest in the car’s segment, while the sculptural design again distinctive of BMW provides a smooth flow of lines from the front along the side to the rear, creating a body where everything fits together as if out of one mould.

Charismatic front, elegant side, muscular rear.
The expressive front end of the new BMW 5 Series Sedan presents the sporting character of the car. The upright BMW kidney grille – even appearing from some angles to lean forward – symbolizes the forward-pushing motion of the sedan and, together with the powerfully flared wheel arches, gives the front end of the car strong charismatic presence.

In conjunction with the BMW Adaptive Xenon headlights (optional on 528i), the daytime running lights incorporate quite unmistakable LED corona rings, while the direction indicators moved far to the outside are made up of ten LED units each. As a final highlight, an LED focus light marks the upper edge of each headlight unit.

Above the striking contour line running along the car at the height of the door openers, a slightly flared shoulder surface, together with the coupe-like roofline and the stretched window surface, gives the glazed section of the passenger cell a light and stretched look despite its size. Further down the body, concave modeled surfaces create lively light and shade effects emphasizing the sporting character of the sedan. Greater curvature around the rear wheel arches, finally, bears clear testimony to rear-wheel drive typical of a BMW of this kind.

The dynamic lines of the car are further enhanced by the strikingly compact counter-swing at the bottom of the C-pillar. Featuring the smallest radius at this point ever to be seen on a BMW sedan, this re-interpretation of the typical Hofmeister kick underlines the stretched silhouette of the car and gives the passenger cell a light and low appearance.

Running parallel to one another, the contour and sill lines rise up dynamically, the former stretching out from the front wheel arch all the way to the rear lights to create the elegant and dynamic look of the car from the side. The sculptural shape typical of a BMW established in this way makes the side sections and the rear end literally flow into one another.

The contour lines continue into the contours of the rear light clusters and finally come together above the license plate. Seen from the rear, the new BMW 5 Series Sedan also stands out through the concave surface between the contour line and the wheel arches giving the body a distinctly recognizable waist. The flared wheel arches and the horizontal breakdown of the rear end, in turn, strongly emphasize the powerful stature of the sedan, the wide track and the wheels ending flush with the wheel arches further enhancing this impression.

The L-shaped rear light clusters again reflect the typical look of a BMW and provide that unmistakable night design. Three rows of LED lights form the look of homogeneously glowing bodies again quite characteristic of BMW. And last but not least, the direction indicators and brake lights also come in LED technology.

Interior Design
Modern cockpit with clear orientation to the driver

The cockpit is inclined towards the driver at an angle of approximately 7o and the asymmetrically designed center console likewise emphasizes this clear orientation to the driver. The horizontal lines of the instrument panel accentuate the feeling of space.

As in all BMWs, well-researched ergonomics allow for optimum operation of driving controls and other functions. All displays, knobs and buttons serving comfort functions are situated centrally for use by the driver and front passengers; controls for the driver’s use only are to the left of the steering wheel, on or near the steering wheel, or on the front center console. The steering wheel has power tilt and telescopic adjustment and tilt-away for exit and entry; and of course both front seats come standard with 10-way power adjustment including head-restraint height.

The seating position has been improved over the former model both front and rear, with knee-room on the rear seats of the new BMW 5 Series Sedan up by 13 millimeters or 0.5”. Luggage compartment capacity is 520 litres or 18.2 cubic feet, and the folding rear-seat backrest available as an option provides greater flexibility in enlarging the car’s transport capacities. In addition to its 40:60 split, the rear-seat backrest also comes with through-loading and, as yet a further option, a ski-bag for additional convenience.

Instrument panel in Black Panel technology.
Like so many aspects of the new 5 Series sedan, its instrument cluster combines BMW tradition with advanced, beautiful new executions. Here the entire cluster is in a high-resolution Black Panel display, in which four classic circular instruments are most prominent; other driving-relevant displays and readouts – including Navigation if present, vehicle-monitoring functions, upcoming service requirements and other information – also appear here in their various (and function-related) graphic forms. Climate-control settings and controls are located in a second Black Panel display in the center console stack.

4th-generation iDrive: Intuitive, powerful and fast.
With the new 5 Series sedan, BMW’s 4th generation iDrive control screen appears in two versions: with 7.0-in. dimensions and 800 x 480-pixel resolution in standard form, or with the optional Navigation system, in a dazzling 10.2-in., 1280 x 480-pixel version with a wider range of features and functions as in the new BMW 7 Series. Displays are transreflective so that light from the sun actually enhances the images on the screen.

The instrument cluster interacts in new ways with the iDrive control display and the available Head-up Display. According to selected function, users can call up phone numbers or radio stations via the steering-wheel controls. The cluster display also augments iDrive’s optional Navigation display with road-realistic directional instructions, helping the driver to change lanes or negotiate a complicated intersection. If the optional Head-up Display is activated, the relevant directions appear there.

Materials and colors: enhancing the elegance.
The choices of colors and materials further enhance the impression of personal luxury and the interior’s interplay of lines and surfaces. For the dash’s finely grained upper section, there are two colors depending upon the chosen interior color. Dakota leather is standard on the 550i, and available in six color schemes of which three are new; BMW’s luxurious Nappa leather is optional, and available in three color schemes.

The center console comes in two variants: On cars with a manual gearbox the console is split into two sections, the black surface surrounding the gearshift lever and the buttons on the optional Driving Dynamics Control oriented towards the driver. A key holder has been placed between the gearshift lever and the climate controls.

On models with automatic transmission, the space between the electronic gear selector lever and the climate control unit offers enough room for two cupholders and a key holder. A further storage compartment is located behind the iDrive Controller (where there is another cupholder on models with a manual gearbox).

Powertrain: The essence of BMW EfficientDynamics.

The new 5 Series will be offered in the United States with a choice of three gasoline engines. At its introduction, the new 5 Series will be available as a 535i and 550i. The 528i and xDrive all-wheel drive variants of all three models will arrive later in the year.

The 550i is powered by BMW’s stunning 4.4-liter, 400-hp twin turbocharged V-8 engine. Compared to BMW’s earlier, normally aspirated V-8, displacement is reduced from 4.8 to 4.4 liters, and incorporates twin turbochargers with High Precision direct injection. In quantitative terms, the new engine delivers its 400 hp over a range from 5500 to 6400 rpm. Maximum torque is 450 lb-ft, available over the extremely broad range of 1800 to 4500 rpm. Aside from the dramatic thrust that drivers will notice subjectively, the objective data are dramatic too: 0-60 mph is estimated to be in just 5.0 seconds (preliminary) and a top speed when equipped with the Sport Package of 150 mph. For models without Sport Package the maximum speed is limited to 130 mph.

Through its unique reverse-flow layout, the 550i’s V-8 engine is able to achieve higher output without correspondingly higher fuel consumption. In technical terms, the approach involves some very new design details. For the first time, twin turbochargers and the exhaust-cleansing catalytic converters are placed between the V-8’s two cylinder banks. In turn, this required the exhaust camshafts and valves to be inboard so that the path from cylinders to turbochargers (which are driven by exhaust gas) would be kept short. A key benefit of this layout becomes a more compact engine package. This is the reverse of a traditional V-8 layout, and opens a new era of V-8 engine development potential.

BMW’s newest gasoline inline-6 engine will be the powerplant for the new 535i Sedan. It features a single, twin-scroll turbocharger and 3.0 liters of displacement. In addition to High Precision direct injection, the new engine is the first BMW inline-6 to be equipped with both turbocharging and BMW’s VALVETRONIC throttle-less intake technology. The combination of these BMW EfficientDynamics technologies delivers improved throttle response from idle to redline, reduced fuel consumption, and substantially reduced emissions. The new engine is rated at 300 hp at 5800 rpm and 300 lb-ft of torque. The torque peak is notable for its incredible accessibility: the full 300 lb-ft is available from 1200 rpm – 5000 rpm.

Playing a supporting role: innovative new 8-speed automatic transmission.
All new BMW 5 Series models will feature an 8-speed automatic transmission, which brings smooth shifting, sportiness and efficiency to new levels of perfection. Compared to the exemplary 6-speed automatic offered in past BMW models, the 8-speed’s “taller” cruising gears make a significant contribution to reduced fuel consumption and emissions, as well as quietness. And its wider spread of ratios from lowest to highest gear enhances acceleration and response across the range of driving speeds.

Technically speaking, this new automatic’s attributes have been achieved via an innovative concept that provides the two additional ratios (7 and 8) with no increase in bulk or weight. In an arrangement not heretofore employed in an 8-speed automatic, four planetary gearsets and five clutch packs are controlled in a way that no more than two of the five clutch packs are freewheeling at any given time. The modest increase in the number of mechanical elements allows the new transmission to achieve unusually high efficiency: the so-called “gearing efficiency” is higher than 98% in all eight gears. In 6th gear, it’s highest of all because that is direct drive, with no gearing reduction at all. Combine this with reduced friction and the ability to keep the torque converter “locked up” more of the total driving time, and the transmission becomes very much a part of the new 5 Series’ overall efficiency concept.

Two additional gears mean threefold progress: quicker shifts, greater smoothness, enhanced efficiency.
The wider spread of ratios allows the engine to run at lower speeds, mainly in the “tallest” gear, 8th. Yet even with this wider spread, the steps between adjacent gears are reduced; in turn this means a stronger, smoother flow of power during acceleration.

And for the same reason, faster shifts are a further benefit because only one clutch pack is disengaged to shift up or down by one or two gears. On the other hand, downshifting more than two gears is accomplished as a direct shift. For example, a downshift from 8th to 2nd gear is made with only one clutch pack disengagement, and thus occurs without stepping down through the intermediate gears. Thus at one instant the driver can be enjoying the quiet, fuel-efficient low rpm of 8th gear, and in the next instant getting maximum acceleration.

Manual Transmissions: Continuing a BMW tradition
BMW continues as the only manufacturer to offer manual transmissions in the 5 Series’ competitive set, underlining the sporty nature of the car, as well as BMW’s commitment to driving enthusiasts.

The 535i and 550i Sedans will be offered with a 6-speed manual transmission in the United States, providing a level of driver involvement unique in the segment.

Brake Energy Regeneration: an energy-saving innovation.
The new 5 Series sedan continues the roll-out of BMW’s Brake Energy Regeneration system on US models. To save energy and reduce the vehicle’s fuel consumption over time, this system manages the times at which the alternator charges the battery.

Conventionally, a car’s alternator runs continuously and thus is always charging the vehicle’s battery. In the new 5 Series, it charges only when the vehicle is decelerating or braking; otherwise, it freewheels and draws virtually no power from the engine. An electronically controlled clutch, similar to that used with the air-conditioning compressor, is used to engage and disengage the alternator.

Accommodating the less-frequent charging is a special, more powerful vehicle battery that can satisfy the vehicle’s high electrical demands without access to continuous charging. The battery uses a technology called “glass mat,” in which its internal plates are separated with saturated absorbent glass-boron silicate rather than the usual liquid electrolyte. This construction sharply reduces the battery’s conversion of charging energy to heat, and can provide the necessary electrical power for longer periods between charges.

Front suspension: a new multi-link system.
Until recently, all BMW front suspension systems since 1965 had been of the strut type, in which a long, essentially vertical strut carries the shock absorber and participates in the suspension geometry – that is, along with the lower arms it helps determine the angles wheels take as they move up and down. With the double-pivot lower arms of most current BMW Series, the strut concept has been taken to a high level of sophistication in handling, straight-ahead stability and riding comfort. However, time and progress never stop; BMW conceptualists and engineers continually seek even better solutions. So it was that when the 2nd-generation X5 made its debut in 2007, BMW introduced a type of front suspension that achieves even better results, particularly in a large, powerful vehicle.

Now this system has made its debut in the automobile side of BMW’s vehicle line, first in the new 7 Series in 2009 and now in the new 5 Series. In place of the strut, this new system has an upper lateral A-arm. The double-pivot lower arms are retained, so that on each side there are three links or arms. While the two lower arms preserve the double-pivot strut system’s advantages, the new upper arm facilitates the system’s handling and riding comfort by relieving the strut of its geometric duties.

Among the strengths of the double-pivot system are:
• Small positive steering offset, for best steering feel and control under all road conditions. Though the two lower arms don’t actually intersect, if you visually extend their axes to a point where they would intersect, you find a “virtual pivot point” that is ideal for achieving this result. Steering offset is the “lever arm” through which road forces act on the suspension system.
• Large steering caster, for outstanding stability in straight-line driving and excellent steering return action coming out of curves.
• Space for large brakes, allowed by the arrangement of the two lower arms.

The 5 Series sedan’s multi-link configuration adds further virtues:• Reduced friction because the shock absorber (which remains essentially concentric with the spring, as it was with the strut system) no longer helps locate the wheel, and is thus no longer subject to lateral forces. This allows the shock absorbers to damp the wheels’ up-and-down motions in a more efficient, targeted way, enhancing both ride and handling (particularly on uneven road surfaces).
• Anti-roll (stabilizer) bar attached to wheel carrier. This arrangement, which differs from many competitors’ attachment to a suspension link, applies the wheel’s entire vertical movement (up or down) to the anti-roll bar, thus allowing thinner bars to be used. Effective control of body roll (lean) and weight savings are thus achieved.
• Greater freedom to optimize both suspension geometry and shock-absorber action.

Further reducing unsprung weight are the front brake calipers, which are of composite aluminum/cast-iron construction. The suspension subframe, which is sprung weight but important in terms of front/rear weight distribution and total vehicle weight, is also of aluminum. Yet more advantages are found in certain details:
• The trailing (forward) lower arm has a rubber/hydraulic cushion, which provides the most effective “compliance” for reducing road shock.
• The transverse (rearward) lower arm is cushioned by a finely tuned rubber element that fosters direct and precise response to the steering wheel when cornering.

Rear suspension.
The rear suspension, too, is a significant evolution for BMW. Like the front suspension, it is a multi-link system; BMW calls it the Integral system for its small, essentially vertical Integral Link connecting the upper and lower lateral control planes.

The Integral suspension concept has been in use for some years in BMW automobiles, appearing currently in the 5 and 6 Series in 4-link form. With one additional link per side, the Integral V (5-link) system moves one step closer to perfection in its combination of handling response, road adhesion and riding comfort. Here too, most major elements are aluminum, and the rear suspension subframe is also of aluminum.

This complex multi-link system controls rear-wheel geometry very precisely, minimizing unwanted effects under load changes (such as lifting off the accelerator while cornering, or hard acceleration and braking) and achieving a comfortable, supple ride. In the new 5 Series, it adds yet another capability via optional Integral Active Steering as introduced on the 2009 BMW 7 Series.

Precise and efficient: EPS Electric Power Steering making its debut in the BMW 5 Series.
The new BMW 5 Series Sedan is the first car in its segment to feature EPS Electric Power Steering. This innovative steering system enhances both the precision and comfort of the steering process, at the same time ensuring the handling typical of BMW with maximum efficiency. Contrary to conventional mechanical/hydraulic systems, steering assistance is provided in this case by an electric motor activated only when assistance is necessary or desired by the driver. The consumption of energy is reduced to zero when driving in a straight line or when taking a corner with a steady steering angle.

Precise, smooth and harmonious set-up of the steering with the feedback typical of BMW ensures maximum steering accuracy at all times. In the Sport+ mode of Driving Dynamics Control and with DSC switched off, the degree of steering forces is slightly increased in accordance with the style of motoring desired.

EPS serves to control steering feedback from the system with particular precision. At the same time EPS comes as standard on the new BMW 5 Series Sedan with Servotronic gearing steering assistance to the speed of the car. When parking and steering at low speeds, for example, the driver hardly has to make any effort, while at higher speeds power assistance is intentionally reduced for optimum contact to the road and in the interest of well-balanced directional stability.

A further point is that EPS eliminates bumps coming from the steering and any other adverse vibrations very effectively. And by evaluating dynamic driving signals in an appropriate process, EPS gives the driver authentic steering feedback particularly under very dynamic driving conditions.

Integral Active Steering: greater agility in town, enhanced comfort & stability during quick lane changes.
Available as a stand-alone option on the new 5 Series Sedan, Integral Active Steering builds on BMW’s original Active Steering system which debuted on the previous-generation 5 Series. The new Integral Active Steering adds precise measures of rear-wheel steering to enhance safety, comfort, and agility.

At the front wheels, Integral Active Steering electronically varies the steering ratio (the number of degrees the steering wheel must be turned to achieve a 1º steering angle at the front wheels) on the basis of vehicle speed and other driving conditions. This reduces the steering-wheel movements required for parking maneuvers, U-turns and sharp corners.

Also with Integral Active Steering, the rear wheels are steered up to a maximum of 2.5˚ via a servo motor acting on the track rods. At low speeds, they are steered oppositely to the front wheels, reducing the turning circle by approximately 0.5meters (1.6 feet). At higher speeds (above 60kmh / 35mph), the rear wheels steer in the same direction as the fronts, enhancing stability. Additionally, the rear-seat passenger comfort is improved thanks to reduced lateral forces in highway lane-change conditions.

The most sporting 5 Series Chassis to date.
The new 5 Series can be equipped with a Sport Package that adds Adaptive Drive, which contains several key features.
• Driving Dynamics Control, introduced on the 2009 BMW 7 Series and Z4 Roadster, allows the driver to set the ride/handling/drivetrain behavior of the car through a single rocker switch on the center console. Adjacent to the E-shift lever or manual shift lever is the Driving Dynamics Control selector (logically, on the driver’s side). Driving Dynamics Control provides four standard settings that tailor vehicle behavior to different moods. The settings are Comfort, Normal, Sport and Sport+. Affected vehicle parameters include engine throttle response, transmission shift characteristics, power-steering assistance level, and Dynamic Traction Control mode (in the Sport+ setting).
• Dynamic Damping Control is an evolution of the Electronic Damping Control (EDC) that has been available on several BMW models. On the new 5 Series, Dynamic Damping Control (DDC) is combined with a slightly lowered (10mm) suspension. Dynamic Damping Control adjusts the shock absorbers to any level of firmness, quickly adapting to road conditions and the driver’s demands. Suspension control is always optimum for current road conditions, vehicle speed, and load. The shocks default to the softest appropriate setting for the vehicle’s speed, and when the vehicle encounters an irregular road surface, they adjust instantaneously to control ride motions, preserve ride comfort, and maintain adhesion to the road. The system is so fast that even at highway speeds the system can sense a pothole at a front wheel and adjust rear-wheel damping before it reaches the same pothole. Dynamic Damping Control is the first BMW system to vary the shock absorbers’ jounce and rebound strokes (wheel moving upward and downward) both steplessly and independently; this capability results in a unique combination of desirable firmness (for handling) and excellent comfort on uneven road surfaces.
• Active Roll Stabilization. This high-tech system reduces body roll, popularly known as “lean,” in cornering. It improves handling by virtue of better suspension geometry (wheel angles relative to vertical), but there is a psychological component as well: Drivers and passengers alike marvel at the “flat cornering” that results from ARS. When the vehicle enters a corner or curve, or begins an avoidance maneuver, “lateral acceleration” is generated. This is read by a sensor, which transmits a signal to the ECU. The ECU processes this signal and transmits it to the valve/sensor block. In turn, the valve/sensor block determines the hydraulic pressure applied to the anti-roll bars to control body roll.

Electronic limited-slip differential
When DSC is fully de-activated, an electronic limited-slip differential comes into play in vigorous driving. By judicious application of the individual rear-wheel brakes, DSC simulates the effect of a traditional mechanical limited-slip differential. This has the effect of better apportioning power between the two rear wheels and thus improving traction in this driving situation.

For this extremely sensitive and powerful networking of functions, the 5 Series shares an electrical architecture with the 7 Series and 5 Series Gran Turismo that employs FlexRay data-transmission technology. Developed by a consortium of which BMW is a leading member, FlexRay achieves heretofore unheard-of communication speed, some 20 times that previously possible. In the new 5 Series, up to 16 electronic control units can be networked; in no other competitive automobile can longitudinal, lateral and vertical vehicle motions be so precisely monitored and influenced. BMW was the first motor-vehicle manufacturer to offer FlexRay technology in production vehicles; it made its debut in the current BMW X5.

Generously dimensioned disc brakes with composite front rotors.
In this patented construction, each front brake rotor (disc) consists of two pieces: the high-carbon cast-iron outer portion, which functions conventionally as the surface onto which the brake pads grip to slow or stop the vehicle; and an aluminum “hat” in the center, which mounts the rotor to the vehicle. The concept’s advantages include reduced unsprung weight, complementing the aluminum suspension in benefiting ride comfort and road adhesion.

Reduced rotor deformation under hard braking is the other benefit. This means fewer tendencies of the brakes to vibrate when hot, and reduced likelihood of rotors cracking under extreme heat conditions.

The 5 Series brake system is supported by the comprehensive functions of Dynamic Stability Control (DSC). These include antilock braking (ABS), Automatic Stability Control (ASC), Cornering Brake Control and Dynamic Brake Control; each of these functions contributes to vehicle stability and some of them do so specifically during braking. Other braking enhancements via DSC include Brake Fade Compensation, which compensates for loss of braking power (fading) under hard or repeated brake use; Brake Standby, which snugs the brake pads up to the rotors upon sharp deceleration to reduce inherent lag time in brake application; and Brake Drying, which brings the pads to the rotors periodically during wet-weather driving to keep the brakes ready. Automatic Hold, a function included in the 5 Series, 7 Series, X5 and X6 models, holds the brakes for an indefinite time when the vehicle is stopped anywhere, preventing rollback or creep; it can be activated or de-activated by the driver with a console button.

Ordering the optional Sport Package will add larger alloy wheels and sportier, summer-performance tires for all models. More information will be available prior to the on-sale date.

Innovative features

The BMW Parking Assistant: extra comfort ensured through fully automatic steering and optimum user guidance.
The range of comfort- and safety-relevant driver assistance systems offered is now being supplemented by yet another innovation: The new BMW 5 Series Sedan is the only BMW available with the BMW Parking Assistant, a new system supporting the driver in safely and comfortably manoeuvring into parking spaces running parallel to the road.

The BMW Parking Assistant supports the driver from the start in choosing appropriate parking space. Ultrasound sensors integrated in the side indicators measure the length and width of possible parking spaces when travelling at a speed of up to 22 mph. The system thus looks for parking spaces exceeding the length of the car by at least 1.20 meters or 47 inches.

When the BMW Parking Assistant is not activated, this measuring process continues in the background without emitting any particular signals to the driver. But as soon as the driver comes to a stop and shifts into Reverse, the iDrive Control Display informs the driver of a suitable parking space by presenting an appropriate symbol. Once the driver has activated the system, all parking spaces sufficient for the car are presented while driving past. In both cases the driver simply has to press the Controller to use the Parking Assistant.

From this point, all the driver has to do is operate the gas and brake pedals and supervise the actual driving manoeuvre, while the Parking Assistant moves the steering wheel appropriately in order to back up precisely into the parking space available. The driver also receives functions to guide him/her though the parking process.

Acoustic and visual messages from Park Distance Control and from the Top View system help the driver in adjusting the distance from other vehicles or obstacles ahead of or behind the car in the parking space chosen.

Innovative Top View and Side View features: enhanced proximity awareness for maneuvering.

The new BMW 5 Series Sedan is available with a back-up camera providing images presented in color and in an optimum perspective in the Control Display. Interactive tracking lines show the driver the optimum steering wheel angle for parking as well as the tightest turning circle. However, the new 5 Series offers an even more advanced proximity-camera system: Top View.

Top View provides an even more comprehensive and complete picture of the car and its surroundings. In addition to the back-up camera and the PDC sensors, Top View uses two cameras in the side mirrors, and combines all three images through a central processor. This provides an overall picture presented in the Control Display showing both the car and its surroundings from a bird’s eye perspective. This clear overview enables the driver to manoeuvre precisely even in confined spaces.

Side View provides specific assistance for the driver in metropolitan driving situations. Side View uses two cameras integrated in the front bumper and serves to monitor traffic moving crosswise to the vehicle. The images obtained in this way are likewise transmitted to the Control Display and provide an early overview of traffic conditions to the left and right of the car, particularly when pulling out of a narrow or unclear driveway.

Innovative combination: Frontal Collision Warning with brake activation function combined with Active Cruise Control and Stop & Go.
The 5 Series’ standard Cruise Control adds new functions. One is the ability to apply the brakes to maintain the set speed on longer downhill stretches; another is continuously monitoring the vehicle’s lateral acceleration and adjusting the speed if rounding a curve too quickly would upset passenger comfort.

Active Cruise Control with Stop-and-Go is optional. In addition to the speed-maintaining, acceleration and deceleration functions of the standard cruise control, ACC can adjust the BMW driver’s speed according to traffic conditions via radar sensors at the front of the vehicle. The Stop-and-Go function can bring the vehicle to a complete stop if traffic calls for it. After a stop of more than 3 seconds, the driver must step on the accelerator or select Resume to accelerate back to the set speed or whatever speed the radar sensors allow.

When equipped with Active Cruise Control, the new BMW 5 Series Sedan has a subsystem called Collision Warning which can apply the brakes. Collision Warning with its brake activation function triggers an alarm in two stages. The pre-warning is an optical message presented as a red car symbol in the instrument cluster and, when fitted, also in the Head-Up Display, warns the driver of the closing rate to the vehicle in front. As soon as this symbol appears, the Brake Standby function on DSC Dynamic Stability Control is activated. This ensures rapid build-up of full brake pressure in an emergency.

The second stage in the collision warning process is activated in the event of an imminent collision. When the driver is required to intervene very quickly, the system sends out an acute warning – in this case not only an optical, but also an acoustic message. It also initiates the braking process required, slowing down the car with stopping power of up to 3 meters/sec2 for a maximum of 1.2 seconds. Brake Standby function is again activated, preparing maximum brake system pressure to achieve the shortest stopping distance possible.

Active Blind Spot Detection
Optional Active Blind Spot Detection in the new BMW 5 Series warns the driver of potentially critical situations when overtaking. Using two radar sensors at the rear end of the car, the system monitors traffic conditions on the adjacent lanes, covering an area extending from the blind angle on the next lane all the way back about 60 meters or almost 200 feet. A triangular yellow light symbol integrated in the housing of the driver’s exterior mirror shows the driver that a vehicle is in the critical range, thus improving situational awareness.

Should the driver set the direction indicator nevertheless, indicating that s/he is about to change lanes, the LED signal in the light will warn the driver by flashing on and off. The driver will also be warned by discreet but unmistakable vibration of the steering wheel.

Lane Departure Warning: camera-based system warns the driver of unintended lane departure even in the dark.
Employing a camera near the interior rearview mirror, Lane Departure Warning monitors road lane markings. When switched on, anytime the vehicle begins to move across a lane marking without the turn signals activated, this system vibrates the steering wheel. If the driver does activate the signals, LDW does not react. Lane Departure Warning detects unintended departure from the appropriate lane at a speed of at least 70 km/h or 43 mph. This system is made up of a camera fitted near the interior mirror on the windscreen, a control unit for comparing data, and a signal generator making the steering wheel vibrate as in the case of a Active Blind Spot Detection .

The camera incorporated in the Lane Departure Warning system monitors the road markings on at least one side of the car, a control unit calculating the position of the vehicle in relation to such road markings. The camera is able to look ahead about 50 meters or 165 feet, and is also able to respond appropriately in bends or on narrow lanes. The system even works in the dark once the headlights have been switched on, making it helpful under everyday driving conditions.

Sophisticated headlight technology with intelligent control.
Standard on the 535i and 550i, the new BMW 5 Series Sedan is fitted with the latest generation of Xenon Adaptive Headlights. Xenon Adaptive Headlights illuminate the road ahead clearly and brightly under all conditions, following curves and winding routes. In the process the headlights turn in the same direction as the steering wheel, following the steering, the yaw rate and the speed of the car.

The optional Automatic High-Beam feature in the new BMW 5 Series offers additional safety when driving at night. Taking current driving conditions into account, this system switches the high beam on and off automatically as required, consistently giving the driver optimum visibility and at the same time relieving him of the chore to constantly monitor the high beam in the case of oncoming traffic.

Processing images generated by a camera integrated in the interior mirror, the Automatic High-Beam feature recognizes vehicles driving ahead in the same direction up to a distance of approximately 400 meters or 440 yards and oncoming vehicles up to a distance of about 1,000 meters or 1,100 yards. A further feature is that the high-beam is switched off automatically as soon as the surrounding light reaches a certain level of intensity and is therefore bright enough.

To avoid collisions from behind, the new BMW 5 Series Sedan, like other models from BMW, feature special Adaptive Brake Lights introduced by BMW as the world’s first manufacturer to offer such a feature. When applying the brakes particularly hard and when ABS is activated, drivers following from behind are alerted by the larger brake lights.

Greater safety when driving at night: BMW Night Vision with Pedestrian Detection.
BMW is the world’s first car maker to offer a night vision system even able to detect individual persons. The second generation of BMW Night Vision available in the new BMW 5 Series as an optional extra sets new standards in avoiding accidents when driving at night. The main feature is a thermal imaging camera fitted at the front end of the car and naturally designed appropriately for the new BMW 5 Series. This camera provides a video image in real time presenting people, animals and other heat-emitting objects in high resolution in the central Control Display, even when they are outside of the headlight beam.

This presentation on the screen is supplemented in the case of BMW Night Vision by the automatic detection of persons on or next to the road. To provide this function, the video data is analysed by a control unit using intelligent algorithms to find pedestrians and cyclists potentially on collision course with the car.

Once the system detects a possible risk involving such persons, the driver is warned by the Control Display and the optional Head-Up Display. This warning is restricted to pedestrians and cyclists who, on account of the speed, steering angle and yaw rate involved, are on a calculated collision course with the vehicle.

Body and safety.
Intelligent lightweight construction of even greater fuel economy
Appropriate choice of the right materials helps to balance weight on the new BMW 5 Series Sedan, enhancing both the agility of the car as well as its fuel economy and emission rating.

This optimization of weight comes together with a further increase in passive safety and is possible through the appropriate use of high-strength multi-phase steel, ultra-high-strength hot-moulded steel, and aluminium.
The large share of high-strength and ultra-high-strength steel gives the safety passenger cell of the new BMW 5 Series Sedan maximum stiffness and stability without the additional use of material. The positive properties of the steel used allow an increase in mean body strength and stiffness by 55 percent over the former model.

The torsional stiffness of the vehicle as a function of its footprint and weight has also been significantly improved. Spring supports made of pressure-cast aluminium enhance the driving dynamics of the new BMW 5 Series in two respects, making the entire front section even stiffer and, through their low weight, further improving the overall balance of the car.

For the first time the doors of the BMW 5 Series Sedan are made of aluminium, reducing weight by approximately 23 kg or 50 lb versus a conventional structure. The front side panels, the hood and a large number of the front and rear axle components are also made of this particularly light metal.

In the interior, 2-stage front airbags, seat-mounted side-impact airbags and curtain-type, front-to-rear head protection are all standard equipment, controlled according to crash type and severity for optimum effect. Airbags that are not needed for the impact at hand are not deployed, yet remain ready to deploy in case of a secondary impact. The power tilt/telescopic steering column includes a robustly dimensioned deformation section, improving its ability to protect the driver from structural intrusion into the cabin.

All seating positions are equipped with 3-point safety belts; all have force limiters, the front ones also adding automatic tensioners plus pre-tensioning during emergency braking. For protection against head and neck injuries in a rear-end impact, the front seats include active head restraints, which deploy up to 2.36 in. forward and 1.57 in. upward as required – all between the time the rear impact begins and when the occupants’ heads would be thrown rearward.

The rear outboard seating positions are equipped with LATCH (Lower Anchors and Tethers for Children) for securing a child restraint seat.

EPA MPG

Safety (NHTSA)

Horsepower

2011 BMW 5-Series News and Reviews

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